xdrv_06_snfbridge.ino

/*
  xdrv_06_snfbridge.ino - sonoff RF bridge 433 support for Sonoff-Tasmota
*/

/*********************************************************************************************\
  Sonoff RF Bridge 433
\*********************************************************************************************/

#define SFB_TIME_AVOID_DUPLICATE  2000  // Milliseconds

enum SonoffBridgeCommands {
    CMND_RFSYNC,      CMND_RFLOW,      CMND_RFHIGH,      CMND_RFHOST,      CMND_RFCODE,      CMND_RFKEY,      CMND_RFRAW };
const char kSonoffBridgeCommands[] PROGMEM =
  D_CMND_RFSYNC "|" D_CMND_RFLOW "|" D_CMND_RFHIGH "|" D_CMND_RFHOST "|" D_CMND_RFCODE "|" D_CMND_RFKEY "|" D_CMND_RFRAW;

uint8_t sonoff_bridge_receive_flag = 0;
uint8_t sonoff_bridge_receive_raw_flag = 0;
uint8_t sonoff_bridge_learn_key = 1;
uint8_t sonoff_bridge_learn_active = 0;
uint8_t sonoff_bridge_expected_bytes = 0;
uint32_t sonoff_bridge_last_received_id = 0;
uint32_t sonoff_bridge_last_send_code = 0;
unsigned long sonoff_bridge_last_time = 0;
unsigned long sonoff_bridge_last_learn_time = 0;

#ifdef USE_RF_FLASH
/*********************************************************************************************\
 * EFM8BB1 RF microcontroller in-situ firmware update
 *
 * Enables upload of EFM8BB1 firmware provided by https://github.com/Portisch/RF-Bridge-EFM8BB1 using the web gui.
 * Based on source by Erik Andrén Zachrisson (https://github.com/arendst/Sonoff-Tasmota/pull/2886)
\*********************************************************************************************/

#include "ihx.h"
#include "c2.h"

#define RF_RECORD_NO_START_FOUND -1
#define RF_RECORD_NO_END_FOUND -2

ssize_t rf_find_hex_record_start(uint8_t *buf, size_t size)
{
  for (int i = 0; i < size; i++) {
    if (buf[i] == ':') {
      return i;
    }
  }
  return RF_RECORD_NO_START_FOUND;
}

ssize_t rf_find_hex_record_end(uint8_t *buf, size_t size)
{
  for (ssize_t i = 0; i < size; i++) {
    if (buf[i] == '\n') {
      return i;
    }
  }
  return RF_RECORD_NO_END_FOUND;
}

ssize_t rf_glue_remnant_with_new_data_and_write(const uint8_t *remnant_data, uint8_t *new_data, size_t new_data_len)
{
  ssize_t record_start;
  ssize_t record_end;
  ssize_t glue_record_sz;
  uint8_t *glue_buf;
  ssize_t result;

  if (remnant_data[0] != ':') { return -8; }  // File invalid - RF Remnant data did not start with a start token

  // Find end token in new data
  record_end = rf_find_hex_record_end(new_data, new_data_len);
  record_start = rf_find_hex_record_start(new_data, new_data_len);

  // Be paranoid and check that there is no start marker before the end record
  // If so this implies that there was something wrong with the last start marker saved
  // in the last upload part
  if ((record_start != RF_RECORD_NO_START_FOUND) && (record_start < record_end)) {
    return -8;  // File invalid - Unexpected RF start marker found before RF end marker
  }

  glue_record_sz = strlen((const char *) remnant_data) + record_end;

  glue_buf = (uint8_t *) malloc(glue_record_sz);
  if (glue_buf == NULL) { return -2; }  // Not enough space

  // Assemble new glue buffer
  memcpy(glue_buf, remnant_data, strlen((const char *) remnant_data));
  memcpy(glue_buf + strlen((const char *) remnant_data), new_data, record_end);

  result = rf_decode_and_write(glue_buf, glue_record_sz);
  free(glue_buf);
  return result;
}

ssize_t rf_decode_and_write(uint8_t *record, size_t size)
{
  uint8_t err = ihx_decode(record, size);
  if (err != IHX_SUCCESS) { return -13; }  // Failed to decode RF firmware

  ihx_t *h = (ihx_t *) record;
  if (h->record_type == IHX_RT_DATA) {
    int retries = 5;
    uint16_t address = h->address_high * 0x100 + h->address_low;

    do {
      err = c2_programming_init();
      err = c2_block_write(address, h->data, h->len);
    } while (err != C2_SUCCESS && retries--);
  } else if (h->record_type == IHX_RT_END_OF_FILE) {
    // RF firmware upgrade done, restarting RF chip
    err = c2_reset();
  }

  if (err != C2_SUCCESS) { return -12; }  // Failed to write to RF chip

  return 0;
}

ssize_t rf_search_and_write(uint8_t *buf, size_t size)
{
  // Binary contains a set of commands, decode and program each one
  ssize_t rec_end;
  ssize_t rec_start;
  ssize_t err;

  for (size_t i = 0; i < size; i++) {
    // Find starts and ends of commands
    rec_start = rf_find_hex_record_start(buf + i, size - i);
    if (rec_start == RF_RECORD_NO_START_FOUND) {
      // There is nothing left to save in this buffer
      return -8;  // File invalid
    }

    // Translate rec_start from local buffer position to chunk position
    rec_start += i;
    rec_end = rf_find_hex_record_end(buf + rec_start, size - rec_start);
    if (rec_end == RF_RECORD_NO_END_FOUND) {
      // We have found a start but not an end, save remnant
      return rec_start;
    }

    // Translate rec_end from local buffer position to chunk position
    rec_end += rec_start;

    err = rf_decode_and_write(buf + rec_start, rec_end - rec_start);
    if (err < 0) { return err; }
    i = rec_end;
  }
  // Buffer was perfectly aligned, start and end found without any remaining trailing characters
  return 0;
}

uint8_t rf_erase_flash()
{
  uint8_t err;

  for (int i = 0; i < 4; i++) {  // HACK: Try multiple times as the command sometimes fails (unclear why)
    err = c2_programming_init();
    if (err != C2_SUCCESS) {
      return 10;                 // Failed to init RF chip
    }
    err = c2_device_erase();
    if (err != C2_SUCCESS) {
      if (i < 3) {
        c2_reset();              // Reset RF chip and try again
      } else {
        return 11;               // Failed to erase RF chip
      }
    } else {
      break;
    }
  }
  return 0;
}

uint8_t SnfBrUpdateInit()
{
  pinMode(PIN_C2CK, OUTPUT);
  pinMode(PIN_C2D, INPUT);

  return rf_erase_flash();  // 10, 11
}
#endif  // USE_RF_FLASH

/********************************************************************************************/

void SonoffBridgeSendRaw(char *codes, int size)
{
  char *p;
  char stemp[3];
  uint8_t code;

  while (size > 0) {
    snprintf(stemp, sizeof(stemp), codes);
    code = strtol(stemp, &p, 16);
    Serial.write(code);
    size -= 2;
    codes += 2;
  }
}

void SonoffBridgeReceivedRaw()
{
  // Decoding according to https://github.com/Portisch/RF-Bridge-EFM8BB1
  uint8_t buckets = 0;

  if (0xB1 == serial_in_buffer[1]) { buckets = serial_in_buffer[2] << 1; }  // Bucket sniffing

  snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"" D_CMND_RFRAW "\":{\"" D_JSON_DATA "\":\""));
  for (int i = 0; i < serial_in_byte_counter; i++) {
    snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s%02X"), mqtt_data, serial_in_buffer[i]);
    if (0xB1 == serial_in_buffer[1]) {
      if ((i > 3) && buckets) { buckets--; }
      if ((i < 3) || (buckets % 2) || (i == serial_in_byte_counter -2)) {
        snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s "), mqtt_data);
      }
    }
  }
  snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s\"}}"), mqtt_data);
  MqttPublishPrefixTopic_P(RESULT_OR_TELE, PSTR(D_CMND_RFRAW));
  XdrvRulesProcess();
}

/********************************************************************************************/

void SonoffBridgeLearnFailed()
{
  sonoff_bridge_learn_active = 0;
  snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, D_CMND_RFKEY, sonoff_bridge_learn_key, D_JSON_LEARN_FAILED);
  MqttPublishPrefixTopic_P(RESULT_OR_STAT, PSTR(D_CMND_RFKEY));
}

void SonoffBridgeReceived()
{
  uint16_t sync_time = 0;
  uint16_t low_time = 0;
  uint16_t high_time = 0;
  uint32_t received_id = 0;
  char rfkey[8];
  char stemp[16];

  AddLogSerial(LOG_LEVEL_DEBUG);

  if (0xA2 == serial_in_buffer[0]) {       // Learn timeout
    SonoffBridgeLearnFailed();
  }
  else if (0xA3 == serial_in_buffer[0]) {  // Learned A3 20 F8 01 18 03 3E 2E 1A 22 55
    sonoff_bridge_learn_active = 0;
    low_time = serial_in_buffer[3] << 8 | serial_in_buffer[4];   // Low time in uSec
    high_time = serial_in_buffer[5] << 8 | serial_in_buffer[6];  // High time in uSec
    if (low_time && high_time) {
      for (byte i = 0; i < 9; i++) {
        Settings.rf_code[sonoff_bridge_learn_key][i] = serial_in_buffer[i +1];
      }
      snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, D_CMND_RFKEY, sonoff_bridge_learn_key, D_JSON_LEARNED);
      MqttPublishPrefixTopic_P(RESULT_OR_STAT, PSTR(D_CMND_RFKEY));
    } else {
      SonoffBridgeLearnFailed();
    }
  }
  else if (0xA4 == serial_in_buffer[0]) {  // Received RF data A4 20 EE 01 18 03 3E 2E 1A 22 55
    if (sonoff_bridge_learn_active) {
      SonoffBridgeLearnFailed();
    } else {
      sync_time = serial_in_buffer[1] << 8 | serial_in_buffer[2];  // Sync time in uSec
      low_time = serial_in_buffer[3] << 8 | serial_in_buffer[4];   // Low time in uSec
      high_time = serial_in_buffer[5] << 8 | serial_in_buffer[6];  // High time in uSec
      received_id = serial_in_buffer[7] << 16 | serial_in_buffer[8] << 8 | serial_in_buffer[9];

      unsigned long now = millis();
      if (!((received_id == sonoff_bridge_last_received_id) && (now - sonoff_bridge_last_time < SFB_TIME_AVOID_DUPLICATE))) {
        sonoff_bridge_last_received_id = received_id;
        sonoff_bridge_last_time = now;
        strncpy_P(rfkey, PSTR("\"" D_JSON_NONE "\""), sizeof(rfkey));
        for (byte i = 1; i <= 16; i++) {
          if (Settings.rf_code[i][0]) {
            uint32_t send_id = Settings.rf_code[i][6] << 16 | Settings.rf_code[i][7] << 8 | Settings.rf_code[i][8];
            if (send_id == received_id) {
              snprintf_P(rfkey, sizeof(rfkey), PSTR("%d"), i);
              break;
            }
          }
        }
        if (Settings.flag.rf_receive_decimal) {
          snprintf_P(stemp, sizeof(stemp), PSTR("%u"), received_id);
        } else {
          snprintf_P(stemp, sizeof(stemp), PSTR("\"%06X\""), received_id);
        }
        snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"" D_JSON_RFRECEIVED "\":{\"" D_JSON_SYNC "\":%d,\"" D_JSON_LOW "\":%d,\"" D_JSON_HIGH "\":%d,\"" D_JSON_DATA "\":%s,\"" D_CMND_RFKEY "\":%s}}"),
          sync_time, low_time, high_time, stemp, rfkey);
        MqttPublishPrefixTopic_P(RESULT_OR_TELE, PSTR(D_JSON_RFRECEIVED));
        XdrvRulesProcess();
  #ifdef USE_DOMOTICZ
        DomoticzSensor(DZ_COUNT, received_id);  // Send rid as Domoticz Counter value
  #endif  // USE_DOMOTICZ
      }
    }
  }
}

boolean SonoffBridgeSerialInput()
{
  // iTead Rf Universal Transceiver Module Serial Protocol Version 1.0 (20170420)
  if (sonoff_bridge_receive_flag) {
    if (sonoff_bridge_receive_raw_flag) {
      if (!serial_in_byte_counter) {
        serial_in_buffer[serial_in_byte_counter++] = 0xAA;
      }
      serial_in_buffer[serial_in_byte_counter++] = serial_in_byte;
      if (0x55 == serial_in_byte) {  // 0x55 - End of text
        SonoffBridgeReceivedRaw();
        sonoff_bridge_receive_flag = 0;
        return 1;
      }
    }
    else if (!((0 == serial_in_byte_counter) && (0 == serial_in_byte))) {  // Skip leading 0
      if (0 == serial_in_byte_counter) {
        sonoff_bridge_expected_bytes = 2;     // 0xA0, 0xA1, 0xA2
        if (serial_in_byte >= 0xA3) {
          sonoff_bridge_expected_bytes = 11;  // 0xA3, 0xA4, 0xA5
        }
        if (serial_in_byte == 0xA6) {
          sonoff_bridge_expected_bytes = 0;   // 0xA6 and up supported by Portisch firmware only
          serial_in_buffer[serial_in_byte_counter++] = 0xAA;
          sonoff_bridge_receive_raw_flag = 1;
        }
      }
      serial_in_buffer[serial_in_byte_counter++] = serial_in_byte;
      if ((sonoff_bridge_expected_bytes == serial_in_byte_counter) && (0x55 == serial_in_byte)) {  // 0x55 - End of text
        SonoffBridgeReceived();
        sonoff_bridge_receive_flag = 0;
        return 1;
      }
    }
    serial_in_byte = 0;
  }
  if (0xAA == serial_in_byte) {               // 0xAA - Start of text
    serial_in_byte_counter = 0;
    serial_in_byte = 0;
    sonoff_bridge_receive_flag = 1;
  }
  return 0;
}

void SonoffBridgeSendCommand(byte code)
{
  Serial.write(0xAA);  // Start of Text
  Serial.write(code);  // Command or Acknowledge
  Serial.write(0x55);  // End of Text
}

void SonoffBridgeSendAck()
{
  Serial.write(0xAA);  // Start of Text
  Serial.write(0xA0);  // Acknowledge
  Serial.write(0x55);  // End of Text
}

void SonoffBridgeSendCode(uint32_t code)
{
  Serial.write(0xAA);  // Start of Text
  Serial.write(0xA5);  // Send following code
  for (byte i = 0; i < 6; i++) {
    Serial.write(Settings.rf_code[0][i]);
  }
  Serial.write((code >> 16) & 0xff);
  Serial.write((code >> 8) & 0xff);
  Serial.write(code & 0xff);
  Serial.write(0x55);  // End of Text
  Serial.flush();
}

void SonoffBridgeSend(uint8_t idx, uint8_t key)
{
  uint8_t code;

  key--;               // Support 1 to 16
  Serial.write(0xAA);  // Start of Text
  Serial.write(0xA5);  // Send following code
  for (byte i = 0; i < 8; i++) {
    Serial.write(Settings.rf_code[idx][i]);
  }
  if (0 == idx) {
    code = (0x10 << (key >> 2)) | (1 << (key & 3));  // 11,12,14,18,21,22,24,28,41,42,44,48,81,82,84,88
  } else {
    code = Settings.rf_code[idx][8];
  }
  Serial.write(code);
  Serial.write(0x55);  // End of Text
  Serial.flush();
#ifdef USE_DOMOTICZ
//  uint32_t rid = Settings.rf_code[idx][6] << 16 | Settings.rf_code[idx][7] << 8 | code;
//  DomoticzSensor(DZ_COUNT, rid);  // Send rid as Domoticz Counter value
#endif  // USE_DOMOTICZ
}

void SonoffBridgeLearn(uint8_t key)
{
  sonoff_bridge_learn_key = key;
  sonoff_bridge_learn_active = 1;
  sonoff_bridge_last_learn_time = millis();
  Serial.write(0xAA);  // Start of Text
  Serial.write(0xA1);  // Start learning
  Serial.write(0x55);  // End of Text
}

/*********************************************************************************************\
 * Commands
\*********************************************************************************************/

boolean SonoffBridgeCommand()
{
  char command [CMDSZ];
  boolean serviced = true;

  int command_code = GetCommandCode(command, sizeof(command), XdrvMailbox.topic, kSonoffBridgeCommands);
  if (-1 == command_code) {
    serviced = false;  // Unknown command
  }
  else if ((command_code >= CMND_RFSYNC) && (command_code <= CMND_RFCODE)) {  // RfSync, RfLow, RfHigh, RfHost and RfCode
    char *p;
    char stemp [10];
    uint32_t code = 0;
    uint8_t radix = 10;

    uint8_t set_index = command_code *2;

    if (XdrvMailbox.data[0] == '#') {
      XdrvMailbox.data++;
      XdrvMailbox.data_len--;
      radix = 16;
    }

    if (XdrvMailbox.data_len) {
      code = strtol(XdrvMailbox.data, &p, radix);
      if (code) {
        if (CMND_RFCODE == command_code) {
          sonoff_bridge_last_send_code = code;
          SonoffBridgeSendCode(code);
        } else {
          if (1 == XdrvMailbox.payload) {
            code = pgm_read_byte(kDefaultRfCode + set_index) << 8 | pgm_read_byte(kDefaultRfCode + set_index +1);
          }
          uint8_t msb = code >> 8;
          uint8_t lsb = code & 0xFF;
          if ((code > 0) && (code < 0x7FFF) && (msb != 0x55) && (lsb != 0x55)) {  // Check for End of Text codes
            Settings.rf_code[0][set_index] = msb;
            Settings.rf_code[0][set_index +1] = lsb;
          }
        }
      }
    }
    if (CMND_RFCODE == command_code) {
      code = sonoff_bridge_last_send_code;
    } else {
      code = Settings.rf_code[0][set_index] << 8 | Settings.rf_code[0][set_index +1];
    }
    if (10 == radix) {
      snprintf_P(stemp, sizeof(stemp), PSTR("%d"), code);
    } else {
      snprintf_P(stemp, sizeof(stemp), PSTR("\"#%X\""), code);
    }
    snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_XVALUE, command, stemp);
  }
  else if ((CMND_RFKEY == command_code) && (XdrvMailbox.index > 0) && (XdrvMailbox.index <= 16)) {
    unsigned long now = millis();
    if ((!sonoff_bridge_learn_active) || (now - sonoff_bridge_last_learn_time > 60100)) {
      sonoff_bridge_learn_active = 0;
      if (2 == XdrvMailbox.payload) {              // Learn RF data
        SonoffBridgeLearn(XdrvMailbox.index);
        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_START_LEARNING);
      }
      else if (3 == XdrvMailbox.payload) {         // Unlearn RF data
        Settings.rf_code[XdrvMailbox.index][0] = 0;  // Reset sync_time MSB
        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_SET_TO_DEFAULT);
      }
      else if (4 == XdrvMailbox.payload) {         // Save RF data provided by RFSync, RfLow, RfHigh and last RfCode
        for (byte i = 0; i < 6; i++) {
          Settings.rf_code[XdrvMailbox.index][i] = Settings.rf_code[0][i];
        }
        Settings.rf_code[XdrvMailbox.index][6] = (sonoff_bridge_last_send_code >> 16) & 0xff;
        Settings.rf_code[XdrvMailbox.index][7] = (sonoff_bridge_last_send_code >> 8) & 0xff;
        Settings.rf_code[XdrvMailbox.index][8] = sonoff_bridge_last_send_code & 0xff;
        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_SAVED);
      } else if (5 == XdrvMailbox.payload) {      // Show default or learned RF data
        uint8_t key = XdrvMailbox.index;
        uint8_t index = (0 == Settings.rf_code[key][0]) ? 0 : key;  // Use default if sync_time MSB = 0
        uint16_t sync_time = (Settings.rf_code[index][0] << 8) | Settings.rf_code[index][1];
        uint16_t low_time = (Settings.rf_code[index][2] << 8) | Settings.rf_code[index][3];
        uint16_t high_time = (Settings.rf_code[index][4] << 8) | Settings.rf_code[index][5];
        uint32_t code = (Settings.rf_code[index][6] << 16) | (Settings.rf_code[index][7] << 8);
        if (0 == index) {
          key--;
          code |= (uint8_t)((0x10 << (key >> 2)) | (1 << (key & 3)));
        } else {
          code |= Settings.rf_code[index][8];
        }
        snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"%s%d\":{\"" D_JSON_SYNC "\":%d,\"" D_JSON_LOW "\":%d,\"" D_JSON_HIGH "\":%d,\"" D_JSON_DATA "\":\"%06X\"}}"),
                   command, XdrvMailbox.index, sync_time, low_time, high_time, code);
      } else {
        if ((1 == XdrvMailbox.payload) || (0 == Settings.rf_code[XdrvMailbox.index][0])) {  // Test sync_time MSB
          SonoffBridgeSend(0, XdrvMailbox.index);  // Send default RF data
          snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_DEFAULT_SENT);
        } else {
          SonoffBridgeSend(XdrvMailbox.index, 0);  // Send learned RF data
          snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_LEARNED_SENT);
        }
      }
    } else {
      snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, sonoff_bridge_learn_key, D_JSON_LEARNING_ACTIVE);
    }
  }
  else if (CMND_RFRAW == command_code) {
    if (XdrvMailbox.data_len) {
      if (XdrvMailbox.data_len < 6) {  // On, Off
        switch (XdrvMailbox.payload) {
        case 0:    // Receive Raw Off
          SonoffBridgeSendCommand(0xA7);  // Stop reading RF signals enabling iTead default RF handling
        case 1:    // Receive Raw On
          sonoff_bridge_receive_raw_flag = XdrvMailbox.payload;
          break;
        case 166:  // 0xA6 - Start reading RF signals disabling iTead default RF handling
        case 167:  // 0xA7 - Stop reading RF signals enabling iTead default RF handling
        case 169:  // 0xA9 - Start learning predefined protocols
        case 176:  // 0xB0 - Stop sniffing
        case 177:  // 0xB1 - Start sniffing
        case 255:  // 0xFF - Show firmware version
          SonoffBridgeSendCommand(XdrvMailbox.payload);
          sonoff_bridge_receive_raw_flag = 1;
          break;
        case 192:  // 0xC0 - Beep
          char beep[] = "AAC000C055";
          SonoffBridgeSendRaw(beep, sizeof(beep));
          break;
        }
      } else {
        SonoffBridgeSendRaw(XdrvMailbox.data, XdrvMailbox.data_len);
        sonoff_bridge_receive_raw_flag = 1;
      }
    }
    snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_SVALUE, command, GetStateText(sonoff_bridge_receive_raw_flag));
  } else serviced = false;  // Unknown command

  return serviced;
}

/*********************************************************************************************/

void SonoffBridgeInit()
{
  sonoff_bridge_receive_raw_flag = 0;
  SonoffBridgeSendCommand(0xA7);  // Stop reading RF signals enabling iTead default RF handling
}

/*********************************************************************************************\
 * Interface
\*********************************************************************************************/

#define XDRV_06

boolean Xdrv06(byte function)
{
  boolean result = false;

  if (SONOFF_BRIDGE == Settings.module) {
    switch (function) {
      case FUNC_INIT:
        SonoffBridgeInit();
        break;
      case FUNC_COMMAND:
        result = SonoffBridgeCommand();
        break;
    }
  }
  return result;
}